1D8V image
Deposition Date 1999-10-26
Release Date 1999-11-19
Last Version Date 2024-05-22
Entry Detail
PDB ID:
1D8V
Title:
THE RESTRAINED AND MINIMIZED AVERAGE NMR STRUCTURE OF MAP30.
Biological Source:
Source Organism:
Method Details:
Experimental Method:
Conformers Submitted:
1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:ANTI-HIV AND ANTI-TUMOR PROTEIN MAP30
Gene (Uniprot):MAP30
Chain IDs:A
Chain Length:263
Number of Molecules:1
Biological Source:Momordica charantia
Ligand Molecules
Primary Citation
Solution structure of anti-HIV-1 and anti-tumor protein MAP30: structural insights into its multiple functions.
Cell(Cambridge,Mass.) 99 433 435 (1999)
PMID: 10571185 DOI: 10.1016/S0092-8674(00)81529-9

Abstact

We present the solution structure of MAP30, a plant protein with anti-HIV and anti-tumor activities. Structural analysis and subsequent biochemical assays lead to several novel discoveries. First, MAP30 acts like a DNA glycosylase/apurinic (ap) lyase, an additional activity distinct from its known RNA N-glycosidase activity toward the 28S rRNA. Glycosylase/ap lyase activity explains MAP30's apparent inhibition of the HIV-1 integrase, MAP30's ability to irreversibly relax supercoiled DNA, and may be an alternative cytotoxic pathway that contributes to MAP30's anti-HIV/anti-tumor activities. Second, two distinct, but contiguous, subsites are responsible for MAP30's glycosylase/ap lyase activity. Third, Mn2+ and Zn2+ interact with negatively charged surfaces next to the catalytic sites, facilitating DNA substrate binding instead of directly participating in catalysis.

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Primary Citation of related structures